Resize partion in ubuntu

Hi GUies,

I have bought new laptop and ubuntu is preinstalled in it.I have only one partion of size 450GB.I want to resize it.I have downloaded Gpart but its option for resize is  greyed out for biggest partion as its boot partion.Can you please advise any way to resize it without boot?Please check attachment for more clearity.

REgards,
Rtantra
Screenshot-f
LVL 4
Rahul PatilAsked:
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Frosty555Connect With a Mentor Commented:
You need to reboot  the system and boot into a gparted live CD or live USB.

You cannot manipulate the partition that you booted from, you have to boot from something else - such as a live CD.

http://gparted.org/livecd.php
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nobusConnect With a Mentor Commented:
you can use the free BOOTIT_BM for this  :  www.terabyteunlimited.com/       

download it, and make the cd - then boot from it
do NOT install it on disk - hit Cancel
select partition mode  - your disk and partition, and select resize
that's it. - unless you have multiple partitions like
BBBCCCCCDDDDDD (B = boot part, C= OS part, and D= Data part)
then you need to free up some space near the end of CCC, by first shrinking the DDD - then select slide (to move it to the EOD)
it looks like BBBCCCCCDDDDff  (f = free space) - then BBBCCCCCffDDDD

now resize CCC
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Seth SimmonsConnect With a Mentor Sr. Systems AdministratorCommented:
the resize option is disabled because the partition is mounted; that's why you see those 3 key icons there
since it's the root file system, you need to use livecd as mentioned above since you can unmount while it's running
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nobusCommented:
rtantra - why the C grade?  my post is fully correct - and deserves an A
you can modify the grade if you use Request Attention in your initial question, and ask the mod for help
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nobusCommented:
thanks !
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